CN101280912B - Heat tube bundle concentric casing tube waste heat recovery boiler - Google Patents
Heat tube bundle concentric casing tube waste heat recovery boiler Download PDFInfo
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- CN101280912B CN101280912B CN2008100994539A CN200810099453A CN101280912B CN 101280912 B CN101280912 B CN 101280912B CN 2008100994539 A CN2008100994539 A CN 2008100994539A CN 200810099453 A CN200810099453 A CN 200810099453A CN 101280912 B CN101280912 B CN 101280912B
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- 238000011084 recovery Methods 0.000 title claims abstract description 31
- 239000002918 waste heat Substances 0.000 title claims abstract description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000003546 flue gas Substances 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 9
- 238000013459 approach Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000004566 building material Substances 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 206010037660 Pyrexia Diseases 0.000 abstract 1
- 238000004134 energy conservation Methods 0.000 abstract 1
- 239000004575 stone Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 11
- 238000009833 condensation Methods 0.000 description 8
- 230000005494 condensation Effects 0.000 description 8
- 238000012546 transfer Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000005514 two-phase flow Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 electric power Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a heat tube bundle concentric casing tube heat-recovering boiler including a heat exchanger, a steam drum or hot water tank, a flue gas heat collection case, a tube system, the invention is characterized in that the heat exchanger is heat tube bundle concentric double pipe exchanger, more than one set of heat exchanger is arranged on upside cover plate of the flue gas heat collection case, metal fever tube of the heat exchanger is plugged in the flue gas collection heat flow path of the flue gas heat collection case, inner tubes of each set of the are connected in series, series-parallel or parallel by the tube system, and a tube opening of the inner tube of at least a set of heat exchanger has a water-supply tube interface of boiler connected, and a tube opening of the inner tube of at least a set of heat exchanger is communicated with the steam drum or hot water tank with a union tube. The invention has advantages of concentric inner casing tube being circulation column tube of the exhaust-heating boiler, high heat-recovering-using efficiency, compact conformation, dependable performance, thereby being a desired apparatus for small temperature differential waste heat recovery and utilization. The apparatus not only can generate medium, high temperature steam, but also high temperature hot water or assembly utilization. The invention can be abroad used for energy conservation, discharge reduction and environmental conservation of energy-intensive industry such as chemical industry, stone oil industry, electric power industry, coal industry, building material industry etc.
Description
Technical field:
The present invention relates to a kind of heat tube bundle concentric casing tube waste heat recovery boiler.
Background technology:
China's economic fast development over nearly 10 years, people's lives improve constantly, to the demand and the also growth fast thereupon of consumption of the energy.Primary energy consumption mainly contains fossil fuels such as coal, oil and natural gas.Because the China's oil reserves are limited; nearly 50% crude oil relies on import at present; the oil crisis of a new round in addition, coal still are the main fuels and energy sources of China, and the environmental problem that fire coal causes has become the problem that must take seriously in China's strategy of sustainable development.The Chinese government very pays close attention to energy resources and environmental problem recently, and actively takes some countermeasures, and encourages exploitation regenerative resource and power-saving technology, and this is the only way which must be passed of China's sustainable development.The global warming that CO2 emission causes and the pollution of environment are serious day by day, and developed country compares, and the comprehensive energy consumption of China's unit product is far above average level, and this road to China's supervention exhibition will be a serious challenge.Reduce the comprehensive energy consumption of unit product, energy savings, strengthen environmental protection, imperative.
In low temperature exhaust gas/fume emission extensively exist in every profession and trade, major part does not have fine utilization, or directly discharges, and causes the waste of the energy and to the pollution of environment.Because domestic heat recovery technology is backward relatively, organic efficiency is low, causes the heat grade that reclaims lower, and value is not high.
Summary of the invention:
The purpose of this invention is to provide a kind of concentric tubes condenser-two phase flow heat converter structure that utilizes heat pipe principle, the circulation tubulation of concentric inner sleeve as waste heat boiler, thus the incorporate heat tube bundle concentric casing tube waste heat recovery boiler of realization waste heat recovery section and boiler.Heat recovery efficient height of the present invention, compact conformation, dependable performance is the ideal device that little temperature difference Waste Heat Recovery is utilized.High-temperature steam during this device can produce also can produce high-temperature-hot-water or is used in combination.Can be widely used in high energy consumption industry as chemical industry, oil, electric power, coal, industry energy-saving swords such as building materials row and environmental protection.
The objective of the invention is to realize by following mode:
Heat tube bundle concentric casing tube waste heat recovery boiler of the present invention comprises heat exchanger, drum or boiler, the flue gas heat-collecting box, pipe-line system, it is characterized in that: heat exchanger is the heat tube bundle concentric casing tube heat exchanger, heat exchanger is by outer tube, interior pipe, the metal heat pipe, working fluid is formed, diameter of inner pipe is less than outer tube, interior pipe is inserted in the outer tube, the reducing of outer tube two ends also seals on inner pipe with the concentric welding of interior pipe, one row's metal heat pipe is connected on the outer tube equally spacedly, every metal heat pipe is the end sealing other end and is communicated with outer tube, and the cavity between outer tube and metal heat pipe vacuumizes the back and charge into working fluid in every metal heat pipe; Flue gas heat-collecting box two ends are established gas approach and exhanst gas outlet respectively, at the heat exchanger that is equipped with on the upper side cover of flue gas heat-collecting box more than a group, the metal heat pipe of heat exchanger is inserted in the flue gas thermal-arrest runner of flue gas heat-collecting box, each metal heat pipe of organizing heat exchanger is parallel to each other, each interior pipe of organizing heat exchanger is each other with pipe-line system series connection, connection in series-parallel or be connected in parallel, and a mouth of pipe that is connected to the interior pipe of boiler water filling interface tube, at least one group of heat exchanger on a mouth of pipe of the interior pipe of at least one group of heat exchanger is communicated with drum or boiler with tube connector.
The best combination mode of above-mentioned heat tube bundle concentric casing tube heat exchanger and flue gas heat-collecting box is: the axis normal of the flue gas thermal-arrest runner of metal heat pipe and flue gas heat-collecting box places flue gas thermal-arrest runner, so that the heat pipe cross section of the overheated tube bundle exchanger of flue gas vertical current can certainly be certain angle and place flue gas thermal-arrest runner with the flue gas thermal-arrest runner of flue gas heat-collecting box; Sealing ring is established in metal heat pipe and flue gas heat-collecting box upper side cover contact site, and sealing ring is contained in the taper hole of flue gas heat-collecting box upper side cover, compresses sealing by high-temperature sealing material, in case smoke spillage.
On the metal heat pipe of above-mentioned heat tube bundle concentric casing tube heat exchanger, be provided with fin.
Establish semicircle flow-stopping plate in the position between the interior pipe and outer tube of above-mentioned heat tube bundle concentric casing tube heat exchanger, between per two adjacent metal heat pipes, prevent condensate liquid channelling between heat pipe in condensation process of working fluid, thereby cause the uneven homogenize of properties of hot pipe, to such an extent as to dryout in advance.The top integral body of semicircle flow-stopping plate communicates.
The interior tube-surface of above-mentioned heat tube bundle concentric casing tube heat exchanger should be done plasma and handle, and to reduce surface energy, realizes the dropwise condensation that pipe is outer, improves heat transfer coefficient.
Advantage of the present invention is:
1, Du Chuan concentric tubes condenser-many heat pipe row phase-change heat exchanger structures, the ingenious evaporation tubulation that utilizes concentric inner hose as waste heat boiler, realized the integrated of waste heat recovery section and boiler evaporating, not only improved heat recovery efficient, and, compact conformation is reliable, convenient maintenance and replacement.
2, incorporate many heat pipe row structures make the equalizing temperature on the same flue gas flow channel cross section, avoid local overcooling or overheated.All heat pipes are shared the concentric tubes condenser, and rational in infrastructure, condensation area is big, adjusts the thermic load of every heat pipe automatically, and total heat transfer is big.
3, between interior pipe and outer tube, establish semicircle flow-stopping plate, prevent the channelling between heat pipe in condensation process of condensate liquid, thereby cause the uneven homogenize of properties of hot pipe, to such an extent as to dryout in advance.
4, utilize the trapezoidal compressing structure be welded on the fin heat pipe, clamp-on the awl that has high-temperature sealing material on the flue gas flow channel top board lateral opening in, sealing fume.Simple in structure, be easy to install.
5, heat pipe is arranged available different material and is made the environment that is applicable to high temperature, middle gentle low temperature, or anti-different flue gas corrosion characteristic, is installed on the leading portion of flue, and stage casing and back segment help improving the temperature of waste heat recovery, the security reliability of equipment and service life.Thereby reduce the cost and the operating cost of equipment.
6, working fluid can be arranged selected material according to the operating temperature and the heat pipe of equipment, selects suitable working fluid, thereby has guaranteed the service life and the performance of device.
7, interior tube-surface plasma is handled, and has reduced surface energy, has realized the outer dropwise condensation of pipe, improves heat transfer coefficient.The high-efficiency fin pipe absorbs the heat of high-temperature flue gas, and at in-tube evaporation and prolong inner width and the inner sleeve pipe outside dropwise condensation of finned tube upward to concentric tubes, heat is absorbed by the two phase flow at interior pipe and evaporates, and enters drum or boiler.Because the efficient heat transfer of phase transformation and device is integrated, the heat recovery efficiency height of device.
8, because heat pipe row's the structure and the independent property of hot-fluid are installed according to purposes and flue gas characteristic, realize series connection, parallel connection and connection in series-parallel; Effectively reduce breath pain flow resistance, improve the temperature of steam or hot water, control exhanst gas outlet temperature has improved heat recovery rate and has prevented the following corrosion of flue gas dew point.
9, in the high temperature of flue, middle temperature, low-temperature zone, installation can be used the heat pipe row of different qualities, can improve the safety of device, reliability, the cost of reduction device.
10, the present invention can be used for the steam waste heat recovery boiler, also can be used for the afterheat of hot water recovery boiler.
Description of drawings:
Fig. 1 is the structural representation that the mutual connection in series-parallel of the interior pipe of heat exchanger of the present invention connects;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the left view of Fig. 1;
Fig. 4 is an operation principle schematic diagram of the present invention;
Fig. 5 is the structural representation that the interior pipe of heat exchanger of the present invention is connected in parallel each other;
Fig. 6 is the structural representation that the interior pipe of heat exchanger of the present invention is connected in series each other.
Among the figure: 1. go up the supply mains, 2. heat exchanger connects water pipe, and 3. vapour-liquid two heat phase connect water pipe, 4. outer tube, 5. drum tube connector, 6. high-temperature flue gas import, 7. liquid level gauge, 8. drum, 9. pressure is taken into account interface, 10. steam (vapor) outlet, 11. safety valves and interface, 12. blowoff valve interfaces, 13. the heat tube bundle concentric casing tube heat exchanger, 14. flue gas heat-collecting boxes, the outlet of 15. low-temperature flue gas, 16. sealing ring, 17. drum bracing frames, 18. fins, 19. the metal heat pipe, 20. working fluids, 21. condensate liquids, 22. interior pipe, 23. flow-stopping plate, 24. vapour-liquid two phase flows, 25. solution-air Disengagement zone, 26. steam, 27. vapour liquid separators.
The specific embodiment:
With reference to the accompanying drawings the present invention is further described:
Accompanying drawing 1,2,3, shown in being is a kind of version of the mutual connection in series-parallel connection of interior pipe of heat exchanger of the present invention, and its agent structure is made up of many groups heat tube bundle concentric casing tube heat exchanger 13, drum 8, flue gas heat-collecting box 14, supporting mechanism 17 and pipe-line system.The metal heat pipe 19 of many group heat tube bundle concentric casing tube heat exchangers 13 places flue gas thermal-arrest runner, the heat pipe cross section of the overheated tube bundle exchanger of flue gas vertical current with the axis normal of the flue gas thermal-arrest runner of flue gas heat-collecting box 14.Sealing ring 16 on the heat pipe 19 is located in the taper hole of flue gas heat-collecting box 14 upper cover plates, compresses sealing by high-temperature sealing material, in case smoke spillage.Last supply mains 1 is connected water pipe 2 and connects the interior pipe of the heat exchanger 13 place flue gas heat-collecting box 14 flue gas thermal-arrest runner rears with series system with heat exchanger, as the preheating section of last water.The preheating section outlet be connected water pipe 3 heat exchanger that places heat-collecting box 14 leading portions that is connected in parallel with vapour-liquid two heat phase and connect.The effective drum tube connector 5 that comes out from heat pipe bundle heat exchanger connects the bottom of drums 8, and the steam of generation is derived from steam (vapor) outlet 10.
Waste heat recovery process summary is, when high-temperature flue gas flows into heat-collecting box import 6, and the vertically cross section of the heat pipe bundle heat exchanger by the placing leading portion cooling that is cooled.The lower temperature flue gas in the downstream further with heat pipe Shu Jinhang heat exchange, preheating enters the demineralized water of evaporator section.The exhanst gas outlet temperature exports 15 dischargers with the dew-point temperature that is higher than flue gas from low-temperature flue gas by the flow-control of last water.
Operation principle of the present invention is shown in figure-5, when high-temperature flue gas stream flows through the fin heat pipe of the heat exchanger that vertically places flue, the heat that fin 18 absorbs in the flue gas, be transmitted to the working fluid 20 that is sealed in the heat pipe, fluid 20 absorbs heats and evaporates, the gap of pipe 22, outer tube 4 and in the surperficial dropwise condensation of interior pipe 22 in flowing upward to.Manage the water that is preheated that flows through in 22 in the heating of condensation liberated heat and seethe with excitement formation steam or two vapour-liquid two phase flows 24.Steam or two vapour-liquid two phase flows flow into drum 8, carry out vapour-liquid and separate, and derive steam.Different with the conventional heat pipe waste-heat recovery device, this device utilizes interior pipe in the heat pipe bundle interchanger as the circulation tubulation of waste heat boiler, realized the ingenious integrated of waste heat recovery section and boiler evaporating section, so, heat recovery efficient height, being particularly suitable for less temperature difference heat recovery, is a quantum jump of middle-low temperature heat recovery and utilization technology.
The characteristic and the index of industry kiln/fire grate cigarette tail gas differ widely, and the mode of heat recovery is also different.Temperature and physicochemical characteristics according to useless flue gas, the connected mode of the heat pipe bundle interchanger in the heat tube bundle concentric casing tube waste heat recovery boiler can design three kinds: (1) parallel connection: boiler is once gone up parallel all the heat pipe bundle heat collectors that connect of water, and all lead to drum or boiler, shown in figure-5.Its design feature, every group of heat pipe bundle interchanger is relatively independent, and one time the water parallel flow is crossed all condensers, and flow resistance is less, and front-seat tube bank temperature is lower, back row's good cooling results, the ability of steaming.As the afterheat of hot water recovery boiler, to the good cooling results of tail gas, hot water organic efficiency height.(2) connection in series-parallel type: as figure-1, shown in 2,3, its inventive point is: 1) utilize the lower temperature of flue gas back segment, water is once gone up in preheating, helps the vaporization of leading portion, improves steam ability and pressure; 2) leading portion interchanger vapor (steam) temperature and vaporization rate height, steam are carried secretly few, can produce high-temperature steam; 3) water yield is once gone up in adjusting, can effectively control the exhanst gas outlet temperature, prevents that flue gas is lower than the corrosion that dew-point temperature causes; (3) series connection: shown in figure-6, all heat pipe bundle interchangers join end to end, and last water enters the interior pipe of interchanger from an end, and steam-water mixture is from other end admission bag or boiler.The characteristics of this kind connected mode are: 1) flow velocity is fast, and heat-transfer effect is good, is easy to control flow and exhanst gas outlet temperature, and disadvantageously the flow resistance of system is higher.
Embodiment:
Steel-water helical fin heat tube bundle concentric casing tube steam waste heat recovery boiler
Structure: 10 heat extractions tube bank concentric tubes heat exchanger; Every heat extraction tube bundle exchanger is made up of 12 helical fin heat pipes;
Heat tube bundle concentric casing tube heat exchanger connected mode: series-multiple connection;
Heat tube bundle concentric casing tube heat exchanger material: boiler steel;
Working fluid: pure water+degasifier;
Serviceability temperature: 20 ℃-+400 ℃.
Claims (4)
1. heat tube bundle concentric casing tube waste heat recovery boiler, comprise heat exchanger, drum or boiler, the flue gas heat-collecting box, pipe-line system, it is characterized in that: heat exchanger is the heat tube bundle concentric casing tube heat exchanger, heat exchanger is by outer tube, interior pipe, the metal heat pipe, working fluid is formed, diameter of inner pipe is less than outer tube, interior pipe is inserted in the outer tube, the reducing of outer tube two ends also seals on inner pipe with the concentric welding of interior pipe, one row's metal heat pipe is connected on the outer tube equally spacedly, every metal heat pipe is the end sealing other end and is communicated with outer tube, and the cavity between outer tube and metal heat pipe vacuumizes the back and charge into working fluid in every metal heat pipe; Flue gas heat-collecting box two ends are established gas approach and exhanst gas outlet respectively, at the heat exchanger that is equipped with on the upper side cover of flue gas heat-collecting box more than a group, the metal heat pipe of heat exchanger is inserted in the flue gas thermal-arrest runner of flue gas heat-collecting box, each metal heat pipe of organizing heat exchanger is parallel to each other, each interior pipe of organizing heat exchanger is each other with pipe-line system series connection, connection in series-parallel or be connected in parallel, and a mouth of pipe that is connected to the interior pipe of boiler water filling interface tube, at least one group of heat exchanger on a mouth of pipe of the interior pipe of at least one group of heat exchanger is communicated with drum or boiler with tube connector.
2. heat tube bundle concentric casing tube waste heat recovery boiler according to claim 1 is characterized in that: the axis normal of the flue gas thermal-arrest runner of metal heat pipe and flue gas heat-collecting box places flue gas thermal-arrest runner.
3. heat tube bundle concentric casing tube waste heat recovery boiler according to claim 1 is characterized in that: be provided with fin on the metal heat pipe.
4. heat tube bundle concentric casing tube waste heat recovery boiler according to claim 1 is characterized in that: establish semicircle flow-stopping plate in the position between the interior pipe and outer tube of heat tube bundle concentric casing tube heat exchanger, between per two adjacent metal heat pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100994539A CN101280912B (en) | 2008-05-09 | 2008-05-09 | Heat tube bundle concentric casing tube waste heat recovery boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100994539A CN101280912B (en) | 2008-05-09 | 2008-05-09 | Heat tube bundle concentric casing tube waste heat recovery boiler |
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| Publication Number | Publication Date |
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| CN101280912A CN101280912A (en) | 2008-10-08 |
| CN101280912B true CN101280912B (en) | 2010-12-08 |
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| CN2008100994539A Expired - Fee Related CN101280912B (en) | 2008-05-09 | 2008-05-09 | Heat tube bundle concentric casing tube waste heat recovery boiler |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032545A (en) * | 2010-11-18 | 2011-04-27 | 哈尔滨锅炉厂有限责任公司 | Sensible-heat waste heat recycling device with special heating surface structure |
| CN102155732B (en) * | 2010-12-02 | 2013-04-03 | 无锡中阳新能源科技有限公司 | Double-pressure direct-combustion reheating-type heating power output device |
| CN102401590A (en) * | 2011-11-21 | 2012-04-04 | 昆明理工大学 | Heat pipe heat exchange organic medium Rankine cycle medium and low temperature flue gas waste heat power generation system |
| CN103880269A (en) * | 2012-12-20 | 2014-06-25 | 上海蕲黄节能环保设备有限公司 | Flue gas recovery system of glass kiln heat preservation channel |
| CN105157216A (en) * | 2015-08-31 | 2015-12-16 | 太仓英达锅炉设备有限公司 | Novel boiler device |
| CN106595056B (en) * | 2017-01-27 | 2023-01-24 | 黄婉平 | Heat exchanger applied to gas heating water heater or gas water heater |
| CN108847292B (en) * | 2018-07-23 | 2024-08-13 | 上海核工程研究设计院股份有限公司 | Plug-in heat pipe evaporation section heat exchanger for passive cooling of spent fuel pool |
| CN110514042A (en) * | 2019-08-09 | 2019-11-29 | 内蒙古科技大学 | Heat pipe bundle sleeve heat exchanger and waste heat recovery device |
| CN117906385B (en) * | 2024-03-19 | 2024-05-28 | 厦门兴荣锂源科技有限公司 | Kiln energy-saving device |
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2008
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Granted publication date: 20101208 Termination date: 20120509 |